On 3/18/2021 6:36 AM, Lamar Owen wrote: > On 3/18/21 1:24 AM, John R. Dennison wrote: >> It's not realistic to expect server-class machines not to be able to >> boot from dual-layer or USB media in 2021. > There are environments where USB or other writeable media are not > allowed on premises. > > While all DVD-ROM drives are supposed to read DL media, in practice > the compatibility has not proven to be 100%. > _______________________________________________ You can safely assume that a DVD+/-R written to by an admin and read in by a DVD-ROM is a one-way vector at that data transmission level, with nothing beyond the bits happening. If your USB ports are sealed with epoxy, USB is indeed not an option... and that's a feature, not a bug. -jc